Have you heard about Cervelo's philosophy on cockpit size? It involves using the distance between the bb and the head tube along the top tube. Since your position to the bb is fixed based on KOPS, Cervelo feels this horizontal dimension will determine your best fit. Is this a good way to fit a bike? Wouldn't this determing what your actual reach from your riding position would be?

Sounds similar to Gary Klein's theory.

Spoke WrenchJun 28, 2002 1:55 PM

Klein's system involves using the distance and angle of a line from the handlebars to the bottom bracket.

I've got years of experience fitting people to conventional road bike frames, but I haven't yet figured out how to relate these unusual sizing systems to what I already know. I'm not totally confident in sizing people to compact geometry frames, like Giant, either.

On compact geometry

elvientoJun 28, 2002 2:08 PM

Just look at virtual toptube length and and virtual seattube length. The rest is the same.